Spool construction



Aug. 24, 1954 w. z. JARMICKI sPooL CONSTRUCTION originell Filez; July e. 194e Patented Aug. 24, 1954 I jfUNlrEDf sTArl-:s PATEN sPooL CONSTRUCTION Wincenty Zygmunt Jarmicki,` Toronto, Ontario,

Canada, assignor to Dominion Magnesium Lnnited, Toronto, Ontario, Canada, a corporation 11,1., g= s of Ontario Original application July 6, 1 948, SeriaLNo. gf

37,142, now Patent No. 2,601,660, dated June 24, 1952. Divided and this application November 7, 1951, Serial No. 255,289

flanges, a center tube on the ends of which thev flanges are mounted, and a cylindrical drum on Which the wire is wound. Various ways of arranging and assembling the parts have heretofore been proopsed With a View to providing economical manufacture. In the larger type of spool having end flanges of, for instance, 8 to 24 inches or greater in diameter, and adapted to carry heavy Wires, the problem is to combine ease and economy of manufacture with required strength of structure. Generally speaking, in the past, the rigid assembly of the various parts in relation to each other, in such manner to ensure that the completed spool will withstand all normal strains to which it is subjected, has resulted in relatively involved and costly manufacturing procedures.

It is an object of the present invention to provide a spool for carrying wires and the like which, while possessing necessary strength of structure, is of simple and economical manufacture. More specifically, an object is to provide a spool structure comprising simple and effective assembly means for the tube and barrel in relation to the flanges, and a method of assembling such parts including a single pressing or assembling step and a single welding step.

The invention will be described with reference to the accompanying drawing, in which Figure 1 is an end elevation of one form of spool, and

Figure 2 is a longitudinal section on line 2-2 of Figure 1.

Referring to the drawing, the spool comprises two substantially identical end flanges Iy and 2, an axial tube 3, and a drum 4. While the parts may be formed from various materials, it is preferable, for high strength light Weight requirements, that the flanges and barrel be made of uniformly spaced outwardly a short distance from the bore 5. A plurality of strengthening ribs 8 may be provided on the outer surface of the annular plane portion la of each flange, such ribs joining a peripheral rim Ib on the flange and the hub 5.

The outside diameter of the tube 3 is at least as great as the inside diameter of bore 5 to provide a press t engagement between the ends of the tube and the hubs of the flanges. Preferably, the hub-engaging surfaces of the tube are light alloys such as magnesium and the tube of K steel.

Each ange comprises a disc-like member having an axial bore y5 in a hub portion 5 and a series of uniformly spaced inwardly directed lugs or wall portions 6 angularly offset from the Wall or annular plane portion la of the flange which produce Weld openings 1 in the wall. As shown, the lugs 6 and weld openings 1 are radially and nely knurled as indicated at 9 to accentuate the frictional engagement of the tube and hubs.

The inside diameter of the drum 4 coincides approximately with the diameter of a circle pass-y ing through the outer limit of the weld openings 1. Thus, the deflected Wall portions 6 constitute positioning lugs for the drum to locate it in proper relative position with respect to the end flanges. However, if desired, separate drum locating lugs I0 on the inside surface of the flanges may be provided.

It will be observed that, with the four parts of the spool arranged in axial relation, a single pressing operation is suflicient to assemble the tube and flanges and to position the drum in.

proper relation thereto. Thereafter, the drum is welded to the outer edge of each opening 1 and to the deflected adjacent edge portion of lug 6, as indicated at Il, this operation being readily eifected from the ends of the spool.

Thus, the assembly of the spool involves two simple steps only, a pressing or assembling step and a welding step. The resulting spool possesses great strength and rigidity amply sufficient to withstand all normal stresses to which it may be subjected in use.

I claim:

1. A spool for Wire comprising a pair of end discs each having a peripheral rim, an axial hub, an annular plane portion joining said rim and hub, said hub extending forwardly and rearwardly of said plane portion, a plurality of ribs on the external surface of said plane portion joining the rim and hub, and a series of inwardly gagement with the innex` Walls of the discs and Number Name Date each overlying e. series of sa-id offset Wall por- 602,260 Klots Apr. 12, 1898 tions, the inner surfaces of said ends being Weded 1,207,485 Bowen Dec. 5, 1916 to said oiset WalLportons andtuthe adjacent 1,248,830 Dunham Dec..14, 1917 edges ofksaidopeningss, said tube-and drum be- 5 1,842,113 Qugg Jan: 19, 1932 ing otherwise free of attachment to the discs. 1,999,422 Reutter Apr. 30, 1935 2. A spool as dened in claim 1, said discs and 2,352,501 SlaViCek June 27, 1944 drum being formed of magnesium alloy, and said FOREIGN PATENTS tube being formed of steel.

0 Number Country Date References cited in the fuenf. thispatent, 64,161 IIorweyv Nov. 17, 1941 UNITED STATESPATENTS Number Name Date 602,241 Pendleton Apr.; 12, 189815l 

